package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;

@Service
public class UserServiceImpl implements UserService {

    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    public UserMapper userMapper;
    @Autowired
    public WeChatProperties weChatProperties;

    public User wxlogin(UserLoginDTO userLoginDTO) {
        String openid = geOpenId(userLoginDTO.getCode());

        //如果openid为空，抛异常
        if (openid == null)
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);

        //1 查询用户是否注册
        User user= userMapper.getByOpenId(openid);
        //1.1 新用户注册
        if (user == null) {
            user  = User.builder().openid(openid).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }
        //1.2 已注册用户直接返回
        return user;
    }

    //封装获取用户的微信授权码
    public String geOpenId(String code) {
        HashMap<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        //转化为json格式
        JSONObject jsonObject = JSON.parseObject(json);
        return jsonObject.getString("openid");
    }
}
